fix: harden range parser against oversized input

[ryuapp]

Changes

• harden range parsing against oversized operator-separated input that could panic
• reject oversized unbounded OR ranges before collapsing them to *
• add regression and generated-input tests to keep parser panic-free

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
src/range.rs	100.00% <100.00%> (ø)

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